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Philips EE50 secondary emission valve

Size This valve measures 72x37mm overall and has a B9D base.

This is a secondary emission valve designed for amplification of very wide modulation bands, for example for TV use. It uses secondary emission to increase mutual conductance.

Heater voltage 6.3V
Heater current 300mA
Max anode voltage 250V
Max screen voltage 250V
Max anode current 10mA
Max screen current 0.6mA
Max anode dissipation 2.5W
Typical secondary cathode voltage 150V
Typical secondary cathode current -8mA
Mutual conductance (values as above with G1 at -3V) 14mA/V
Ca 7.7pF
Cg1 7.7pF
Cag1 <0.005pF


Pin Function
1 Heater
2 Secondary cathode
3 Anode
4 Screen grid
5 Shield
6 Cathode
7 Control grid
8 Shield
9 Heater




Information provided by Jan Heering

This file was last modified 15:32:04, Tuesday September 02, 2014